Fix and release a docker build

Dockerfile

@@ -1,11 +1,19 @@
-FROM golang:1.18
+# BUILD
+FROM golang:1.18-alpine3.17 AS build
 
-EXPOSE 8080
-WORKDIR /opt/app
-COPY go.* .
+WORKDIR /opt/src
+COPY go.* ./
 RUN go mod download
 
 COPY . .
 RUN go build .
 
+# Make the final image
+FROM alpine:latest
+
+EXPOSE 8080
+WORKDIR /opt/app
+COPY --from=build /opt/src/traefik-lazyload .
+COPY config.yaml .
+
 CMD ./traefik-lazyload